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The development of pills often owe ________ to science-we started with a drug that we hoped would be...
题目内容：
The development of pills often owe ________ to science-we started with a drug that we hoped would be effective in heart disease and we ended up with a medicine that was highly effective against nerve disorder.
A.much chance B.much chance as C.much to chance as D.as much to chance as
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